The invention belongs to the technical field of water conservancy, and discloses a water conservancy slope protection construction device which comprises a driving vehicle, the driving vehicle moves on a water conservancy dam, grass seed
sowing equipment and winding equipment are installed on the driving vehicle, and the water conservancy slope protection construction device further comprises a supporting
assembly installed on the side of the driving vehicle. A first butt-joint frame is connected with the side portion of a driving vehicle, a first
pipe frame rotates at the hinged position of the first
pipe frame and a first sector plate, a spraying
assembly is kept parallel to a slope of a slope protection slope, a second butt-joint block rotates at the hinged position of a second sector plate, and a second butt-joint rod is rotated to fix the second butt-joint block and the second sector plate; the overall operation stability of the equipment can be improved through rollers, namely, the grass seed
sowing equipment is connected with a spraying
assembly, a driving vehicle drives a first
butt joint rod to move, slope protection is sown through the spraying assembly, the grass seed spraying uniformity is improved, it is guaranteed that the slope protection uniformly covers a
lawn, the slope protection is more attractive, and the overall protection capacity of the slope protection is improved.